APICS CPIM CSCP Exam Forms
APICS CPIM and CSCP exams are made up from a large pool of questions that are assembled into a smaller group of questions called "forms." A single form is what you see as "the exam." Multiple forms (exams) are made from the large pool of questions. New questions are periodically added to the pool while others are retired. The exam questions are developed by a group of APICS certified industry professionals that are professionally led by exam experts in what is called an "item writing workshop." If you take an exam more than once it is likely you won't see the same exam form again.
The relatively low number of questions on an exam is not enough to test your knowledge on the entire body of knowledge as defined in the Exam Content Manual and their supporting references. It is a very large body of knowledge. Exam forms may treat one area with more or fewer questions than another form and one form may have more calculations than another.